title: High-power all-fiber superfluorescent source with fused angle-polished side-pumping configuration.
abstract: We report high-power operation of a broadband superfluorescent source with an all-fiber configuration. The superfluorescent source yields an amplified spontaneous emission (ASE) output of 43.2 and 25.1 W from both ends, respectively. The maximum combined ASE output is 68.3 W with a slope efficiency of 78.6%. The wavelength bandwidths (FWHM) of the counterpropagating and copropagating ASE output are 31.5 and 18.9 nm, respectively. The fused angle-polished side-pumping coupler is applied to set up the all-fiber configuration. Furthermore, the influence of reflectivity on the laser threshold of the ASE sources is studied theoretically. The experimental results agree with the theoretical analysis.
authors.affiliation: Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instruments and Mechanology, Tsinghua University, Beijing, China.
authors.forename: Qirong
authors.initials: Q
authors.lastname: Xiao
authors.forename: Ping
authors.initials: P
authors.lastname: Yan
authors.forename: Yaping
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinping
authors.initials: J
authors.lastname: Hao
authors.forename: Mali
authors.initials: M
authors.lastname: Gong
mesh_terms: D000465:Algorithms; D004867:Equipment Design / Q000295:instrumentation; D005336:Fiber Optic Technology / Q000295:instrumentation*; D005453:Fluorescence; D053844:Lasers, Solid-State; D008962:Models, Theoretical; D013050:Spectrometry, Fluorescence / Q000295:instrumentation*